13 



Adler's Copper Soaps. These were manufactured by the Adler 

 Color and Chemical Works, loo William St., New York. They 

 failed to mix properly with the water and when spraying with them 

 was attempted, they solidified in the hose so that no test of their 

 value as insecticides could be obtained. 



Good's Potash Whale Oil Soap nine parts ; Lime, Sulphur and 

 Salt one part was also tested but gave poorer results than the Lime, 

 Sulphur and Salt alone. 



The following tabular statement of the results obtained by the use 

 of these different materials will enable closer comparison to be made. 



Relative Cost of Materials. 



Fumigation. The quantity of cyanide for a tent the size of that 

 used in these experiments cost 8 cents. The acid should not cost 

 over 7 cents per pound and the amount needed per tree would cost 

 3 cents. The wholesale price of this acid is about 2^ cents but at 

 retail lo cents is often charged, which of course would make it more 

 expensive. Eleven cents per tree would be a fair cost for fumigating 

 where the tent used contains not more than 360 cubic feet, the cost 

 of the tent and the labor not being included. 



